CN115791582A - Road surface ice-condensation simulation and test device capable of adjusting temperature and humidity - Google Patents
Road surface ice-condensation simulation and test device capable of adjusting temperature and humidity Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 133
- 238000009833 condensation Methods 0.000 title claims abstract description 35
- 238000004088 simulation Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 76
- 239000000203 mixture Substances 0.000 claims abstract description 28
- 230000005494 condensation Effects 0.000 claims abstract description 25
- 239000010426 asphalt Substances 0.000 claims abstract description 24
- 238000012544 monitoring process Methods 0.000 claims abstract description 11
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- 238000009413 insulation Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 19
- 238000007710 freezing Methods 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 12
- 239000004065 semiconductor Substances 0.000 claims description 12
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- 238000005096 rolling process Methods 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 10
- 239000003381 stabilizer Substances 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 8
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 230000000704 physical effect Effects 0.000 abstract description 2
- 230000008014 freezing Effects 0.000 description 9
- 238000009792 diffusion process Methods 0.000 description 4
- 239000003595 mist Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
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- 230000015271 coagulation Effects 0.000 description 2
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- 238000001514 detection method Methods 0.000 description 2
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Abstract
The invention discloses a temperature and humidity adjustable pavement ice-condensation simulation and test device, and relates to the technical field of road engineering test equipment and test of physical properties of asphalt mixtures. The utility model provides a road surface congeals ice simulation and testing arrangement of adjustable temperature humidifying, is including installing test piece refrigerating system, humid air force convection system, congeals the test bin of ice state monitoring system, test piece refrigerating system is including flourishing appearance storehouse and first refrigeration subassembly, and refrigeration subassembly is installed to the below in flourishing appearance storehouse, and flourishing appearance storehouse is used for holding bituminous mixture wheel and grinds the test piece. According to the temperature and humidity adjustable road surface ice condensation simulation and test device, the humidistat is arranged to enable water to be made into water vapor to be diffused into the test bin, so that the humidity of the test environment in the test bin is improved, the actual humid and cold winter environment in the south is simulated, the water vapor ice condensation simulation test device is manufactured, and the condition that the water vapor ice condensation of the road surface is carried out under different temperatures can be tested.
Description
Technical Field
The invention relates to the technical field of road engineering test equipment and testing of physical properties of asphalt mixtures, in particular to a temperature and humidity adjustable pavement ice-condensation simulation and test device.
Background
China's native trans-climate area is many, the meteorological environment is complicated and changeable, the freezing area accounts for more than 75%, the road is very easy to be frozen and accumulated with snow in winter and early spring, the anti-skid performance of the road is reduced sharply, the life and property safety of people is seriously damaged, and the method becomes the fetter of the road safety operation in winter. For a wet mountain road, the terrain condition is severe, the climate environment is complex, when wet and relatively warm air flows through the surface of the low-temperature road, ice crystals are firstly condensed on the top of the texture of the road, and an ice layer is continuously formed to cover the surface of the road to form thin ice along with the ice condensation process. Particularly, for special high-risk areas such as an adjacent water bridge road, a long and large longitudinal slope road section, a curve section ultrahigh area, a tunnel entrance/exit road section, an intersection frequent brake road section and the like in a mountainous area in the south, the formation of road ice on the road surface in winter is often more harmful to the driving safety due to the characteristics of the road ice, such as the paroxysmal property, the unpredictability and the like.
The current road freezes detecting system is mostly through gathering meteorological data judgement road surface icing situation such as road surface temperature, precipitation, or utilize mechanics behind the sensor detection road surface icing, the sound wave, infrared light intensity isoparametric's variation situation calculates the thickness of icing, all be not applicable to the road surface ice-condensation early warning, based on this, the analog detecting system of a series of road surface icing has successively been developed to the student, however the road surface mode of freezing is mostly the icing that drips in this kind of device, although can simulate the frozen state of road surface in freezing rain weather, nevertheless can not be true effectual to endangering more serious road surface ice-condensation phenomenon and simulate.
For example, chinese patent CN103792177a discloses a road ice-freezing climate environment test method and apparatus, which simulates various meteorological elements by setting a manual ice-freezing climate environment simulation test room, and accurately controls atmospheric temperature, humidity, rainfall, wind speed, etc., but this application adopts a sprayer to spray on a simulated road surface, which can simulate rainfall weather road icing conditions, but cannot simulate road ice freezing caused by high south air humidity.
Chinese patent CN216117414U discloses a road surface low-temperature anti-icing simulation test device, which also adopts a spraying device to spray water to a simulated road surface for environmental simulation.
Aiming at the problem that the existing road surface ice accumulation simulation detection system cannot simulate the phenomenon that the road surface is condensed due to water vapor in the environment, and meanwhile, the real meteorological state of the road surface in the vehicle running process is considered, the temperature and humidity adjustable road surface ice condensation simulation and test device is developed, and the ice condensation simulation of the asphalt road surface under different working conditions can be realized.
Disclosure of Invention
The invention aims to provide a temperature and humidity adjustable pavement ice condensation simulation and test device, which is characterized in that a humidistat is arranged to make water into water vapor which is diffused into a test bin, so that the humidity of the test environment in the test bin is improved, the practical south humid and cold winter environment is simulated, and the water vapor ice condensation simulation test device is manufactured, so that the condition of pavement water vapor ice condensation at different temperatures can be tested, and the problems in the background technology are solved.
In order to achieve the purpose, the invention provides the following technical scheme: a pavement ice-condensation simulation and test device capable of adjusting temperature and humidity comprises a test bin provided with a test piece refrigerating system, a wet air forced convection system and an ice-condensation state monitoring system, wherein the test piece refrigerating system comprises a sample containing bin and a first refrigerating assembly;
the system comprises a humidity stabilizer, a pressure stabilizer, an air circulation assembly, a temperature and humidity sensor, an air speed sensor and an air refrigerator, wherein the humidity stabilizer is electrically connected with the pressure stabilizer, the humidity stabilizer increases humidity for a test environment in the test bin by spraying water vapor, the temperature and humidity sensor detects the environment humidity in the test bin, and the air speed sensor detects the air speed in the test bin;
the ice-freezing state monitoring system comprises a precision balance arranged below the refrigeration assembly, a high-definition camera provided with an anti-fog lens and a computer control module, wherein the computer control module records the temperature of an asphalt mixture wheel-rolling test piece, the air temperature, the air humidity, the air flow rate, the ice-freezing quality and the digital image of the ice film condensation process collected in the test bin.
Preferably, the sample containing bin comprises a heat insulation layer, a heat insulation layer and a sealing layer, the heat insulation layer is arranged on the inner wall of the heat insulation layer, and the sealing layer is arranged on the upper portion of the heat insulation layer.
Preferably, the refrigeration assembly comprises a semiconductor low-temperature plate arranged at the bottom of the sample containing bin, a ceramic base connected with the lower surface of the semiconductor low-temperature plate, a heat conduction copper pipe embedded in the ceramic base, radiating fins connected with the lower surface of the ceramic base and radiating fans arranged on two sides of the radiating fins.
Preferably, the air circulation assembly comprises an air circulation pipeline and an air circulation fan, the air circulation pipeline is provided with an air inlet and an air outlet, the air circulation fan and an air refrigerator are installed in the air circulation pipeline, and the air circulation pipeline is installed at the upper end inside the test bin.
Preferably, the output of humidistat is provided with the equipartition subassembly, the equipartition subassembly is including getting into the hose, universal rotary joint, the rotor plate, the fly leaf, spacing frame, stirring fan and driving motor, the one end that gets into the hose and the output fixed connection of humidistat, the other end that gets into the hose with through universal rotary joint and rotor plate swing joint, the rotor plate runs through the fly leaf, and the rotor plate is at fly leaf internal rotation work, the both sides and the spacing frame swing joint of fly leaf, the fly leaf is along spacing frame activity from top to bottom, the upper end of spacing frame is provided with driving motor, driving motor passes through drive gear and rotor plate meshing.
Preferably, one side of the rotating plate, which is far away from the universal rotary joint, is provided with a rectangular gear, the rectangular gear is symmetrically provided with water vapor spray heads, the water vapor spray heads are communicated with the universal rotary joint, and the rectangular gear is meshed with the driving gear.
Preferably, the two ends of the lower surface of the movable plate are symmetrically provided with supporting springs, and the lower ends of the supporting springs are fixedly connected with the limiting frame.
Preferably, one side of the movable plate is provided with an external insection which is meshed with the stirring fan, and the other side of the movable plate is provided with a fan movable plate.
Preferably, the stirring fan is connected with the limiting frame through a connecting plate, a fan blade gear is connected to the stirring fan, and the fan blade gear is meshed with the external gear patterns.
Compared with the prior art, the invention has the beneficial effects that:
1. the humidistat is arranged to make water into water vapor to be diffused into the test bin, so that the humidity of the test environment in the test bin is improved, the practical south humid and cold winter environment is simulated, the water vapor condensation simulation test device is manufactured, and the condition that the water vapor of the pavement is condensed into ice at different temperatures can be tested;
2. the sample containing bin adopts a heat insulation layer and a heat insulation layer to insulate the test piece, when the test piece is cooled, the test piece is sealed through a sealing layer to isolate the influence of air, a semiconductor low-temperature plate is adopted to cool the test piece, the lowest temperature of a cold end can reach-40 ℃, a T-shaped thermocouple and a control circuit are combined, the temperature control precision of the low-temperature plate is +/-0.1 ℃, the measurable range is wide, and the test precision is high;
3. along with the ice-setting process of the surface of the asphalt mixture wheel-grinding test piece, the ice-setting state monitoring system measures the mass through a precision balance, a high-definition camera shoots the ice-setting process and data acquisition of a temperature and humidity sensor and an air speed sensor, and digital images of the asphalt mixture wheel-grinding test piece temperature, the air humidity, the air flow rate, the ice-setting quality and the ice film setting process acquired by the testing system are recorded in real time, so that a testing result is obtained, the automation degree is high, and the data of the testing process are detailed;
4. the output of humidistat is provided with the equipartition subassembly, driving motor passes through drive gear and drives the rotation of rectangular gear, drive the activity from top to bottom of fly leaf for steam shower nozzle on the rectangular gear is in rotatory, nonlinear upper and lower shift, thereby improve the scope that the steam shower nozzle sprayed, improve the homogeneity that the steam shower nozzle sprayed steam, stirring fan moves the air flow, the activity from top to bottom of fan the movable plate simultaneously, with higher speed steam diffusion improves the homogeneity of whole test environment humidity, improves the accuracy of test.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a block diagram of the refrigeration assembly of the present invention;
FIG. 3 is a graph of ice freezing quality data for different temperatures according to the present invention;
FIG. 4 is a graph of ice thickness data for different temperatures according to the present invention;
FIG. 5 is a first perspective view of the equispaced assembly of the present invention;
FIG. 6 is a second perspective view of the equispaced assembly of the present invention;
FIG. 7 is a view of the installation structure of the movable plate and the rotating plate of the present invention;
fig. 8 is an exploded view of the movable plate and the rotating plate of the present invention.
In the figure: 1. a test piece refrigeration system; 11. a sample containing bin; 111. a heat-insulating layer; 112. a thermal insulation layer; 113. a sealing layer; 12. a refrigeration assembly; 121. a semiconductor low temperature plate; 122. a ceramic base; 123. a heat conducting copper pipe; 124. a heat sink; 125. a heat radiation fan; 2. a wet air forced convection system; 21. a humidistat; 22. a voltage stabilizer; 23. an air circulation assembly; 231. an air circulation duct; 232. an air circulation fan; 24. a temperature and humidity sensor; 25. a wind speed sensor; 26. an air cooler; 3. a frozen ice state monitoring system; 31. a precision balance; 32. a high definition camera; 33. a computer control module; 4. a test bin; 5. uniformly distributing the components; 51. entering a hose; 52. a universal swivel joint; 53. a rotating plate; 531. a rectangular gear; 532. a water vapor spray head; 54. a movable plate; 541. a support spring; 542. external insection; 543. a fan moving plate; 55. a limiting frame; 56. a stirring fan; 561. a fan blade gear; 57. a drive motor; 571. the gears are driven.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, a temperature and humidity adjustable road surface ice-condensation simulation and test device comprises a test bin 4 provided with a test piece refrigerating system 1, a wet air forced convection system 2 and an ice-condensation state monitoring system 3, wherein the test piece refrigerating system 1 comprises a sample containing bin 11 and a first refrigerating assembly 12, the refrigerating assembly 12 is arranged below the sample containing bin 11, the sample containing bin 11 is used for containing an asphalt mixture wheel-milling test piece, and the refrigerating assembly 12 is used for refrigerating the asphalt mixture wheel-milling test piece;
the wet air forced convection system 2 comprises a humidistat 21, a voltage stabilizer 22, an air circulation component 23, a temperature and humidity sensor 24, an air speed sensor 25 and an air refrigerator 26, wherein the humidistat 21 is electrically connected with the voltage stabilizer 22, the humidistat 21 increases humidity for the test environment in the test chamber 4 by spraying water vapor, the temperature and humidity sensor 24 detects the environment humidity in the test chamber 4, the air speed sensor 25 detects the air speed in the test chamber 4, and the air refrigerator 26 refrigerates the air passing through the air circulation component 23;
the ice-freezing state monitoring system 3 comprises a precision balance 31 arranged below the refrigerating assembly 12, a high-definition camera 32 provided with an anti-fog lens and a computer control module 33, wherein the computer control module 33 records the temperature of an asphalt mixture wheel-grinding test piece, the air temperature, the air humidity, the air flow rate, the ice-freezing quality and the digital image of the ice film condensation process collected in the test bin 4.
The sample containing bin 11 comprises a heat insulation layer 111, a heat insulation layer 112 and a sealing layer 113, the heat insulation layer 112 is arranged on the inner wall of the heat insulation layer 111, and the sealing layer 113 is arranged on the upper portion of the heat insulation layer 111.
Specifically, heat preservation 111 encloses into boxed structure with seal 113, and seal 113 is mobilizable structure, and in the insulating layer 112 was arranged in to bituminous mixture wheel mill test piece, seals through seal 113, and the cooling was realized through first refrigeration subassembly 12 to bituminous mixture wheel mill test piece in insulating layer 112, falls to the settlement temperature when bituminous mixture wheel mill test piece temperature, removes seal 113, and bituminous mixture wheel mill test piece exposes in the test environment of test chamber 4.
The refrigeration assembly 12 comprises a semiconductor low-temperature board 121 designed at the bottom of the sample accommodating chamber 11, a ceramic base 122 connected with the lower surface of the semiconductor low-temperature board 121, a heat conducting copper pipe 123 embedded in the ceramic base 122, a heat sink 124 connected with the lower surface of the ceramic base 122, and heat dissipation fans 125 mounted on two sides of the heat sink 124.
Specifically, the main working element of the semiconductor cryopanel 121 is a galvanic couple formed by connecting N-type and P-type semiconductors, after the circuits are connected, the galvanic couple generates a cold-hot temperature difference due to heat transfer generated by potential difference, the lowest temperature of the cold end can reach-40 ℃, and the temperature control precision of the cryopanel is +/-0.1 ℃ by combining a T-type thermocouple and a control circuit.
The air circulation assembly 23 includes an air circulation duct 231 provided with an air inlet and an air outlet and an air circulation fan 232, the air circulation duct 231 is internally provided with the air circulation fan 232 and the air refrigerator 26, and the air circulation duct 231 is installed at the upper end inside the test chamber 4.
Specifically, when the air circulation fan 232 works, negative pressure is generated in the air circulation pipeline 231, so that air in the test chamber 4 enters the air circulation pipeline 231, the air entering the air circulation pipeline 231 is cooled under the action of the air cooler 26, and a wet and cold environment on a road surface is simulated.
Loading the prepared asphalt mixture wheel-milled test piece to be tested of 90mm multiplied by 50mm into a sample containing bin 11, controlling the air inlet temperature to be 5 ℃, the relative humidity to be 100 percent and the air speed to be adjusted to be 1m/s, and testing the ice-congealing mass and the ice-congealing thickness under the conditions of-5 ℃, 10 ℃ and-15 ℃ to obtain a data graph as shown in figures 3-4, wherein the lower the pavement temperature is, the shorter the ice film condensation time is, and the faster the ice film grows in the low-temperature pavement ice-congealing process; as the ice freezing time increases, the growth speed of the ice film approximately shows a parabolic trend, and finally gradually slows down.
Referring to fig. 5-8, the output end of the humidistat 21 is provided with a uniform distribution assembly 5, the uniform distribution assembly 5 includes an inlet hose 51, a universal rotary joint 52, a rotary plate 53, a movable plate 54, a limit frame 55, a stirring fan 56 and a driving motor 57, one end of the inlet hose 51 is fixedly connected with the output end of the humidistat 21, the other end of the inlet hose 51 is movably connected with the rotary plate 53 through the universal rotary joint 52, the rotary plate 53 penetrates through the movable plate 54, the rotary plate 53 rotates in the movable plate 54, two sides of the movable plate 54 are movably connected with the limit frame 55, the movable plate 54 moves up and down along the limit frame 55, the upper end of the limit frame 55 is provided with the driving motor 57, and the driving motor 57 is engaged with the rotary plate 53 through a driving gear 571.
A rectangular gear 531 is arranged on one side of the rotating plate 53 far away from the universal rotating joint 52, vapor spray heads 532 are symmetrically arranged on the rectangular gear 531, the vapor spray heads 532 are communicated with the universal rotating joint 52, and the rectangular gear 531 is meshed with a driving gear 571.
Specifically, the driving motor 57 drives the driving gear 571 to rotate, the driving gear 571 drives the rectangular gear 531 to rotate, accordingly, the rotating plate 53 rotates in the movable plate 54, when the driving gear 571 is engaged with the short side of the rectangular gear 531, the position of the central point of the rectangular gear 531 and the position of the central point of the driving gear 571 are increased, the movable plate 54 is pushed to move downwards in the position-limiting frame 55, when the driving gear 571 is engaged with the long side of the rectangular gear 531, the position of the central point of the rectangular gear 531 and the position of the central point of the driving gear 571 are shortened, the movable plate 54 is pushed to move upwards in the position-limiting frame 55, when the driving gear 571 is engaged with the corner of the rectangular gear 531, the distance between the position of the central point of the rectangular gear 531 and the position of the central point of the driving gear 571 is the largest, the movable plate 54 moves nonlinearly, so that the position of the mist sprayer 532 on the rectangular gear 531 is changed vertically while rotating, thereby increasing the spraying range of the mist sprayer 532 and increasing the uniformity of mist spraying the mist sprayer 532.
The two ends of the lower surface of the movable plate 54 are symmetrically provided with supporting springs 541, and the lower ends of the supporting springs 541 are fixedly connected with the limiting frame 55.
Specifically, the supporting spring 541 pushes the movable plate 54 upward all the time, so that the rectangular gear 531 is engaged with the driving gear 571 all the time, and when the driving gear 571 rotates, the rectangular gear 531 is controlled to rotate synchronously, and the supporting spring 541 is pushed to extend and retract in a reaction manner due to the change of position caused by the rotation of the rectangular gear 531.
One side of the movable plate 54 is provided with an external gear 542, the external gear 542 is engaged with the stirring fan 56, and the other side of the movable plate 54 is provided with a fan plate 543.
Specifically, when the movable plate 54 moves up and down, the outer insection 542 and the fanning plate 543 are driven to move up and down, the outer insection 542 drives the stirring fan 56 to rotate, the stirring fan 56 blows air to flow, water vapor diffusion is accelerated, meanwhile, the fanning plate 543 moves up and down, fanning air flows up and down, water vapor expansion is further accelerated, and the uniformity of moisture in the test environment in the test chamber 4 is improved.
The stirring fan 56 is connected with the limiting frame 55 through a connecting plate, a fan blade gear 561 is connected to the stirring fan 56, the fan blade gear 561 is meshed with the external gear 542, and specifically, the fan blade gear 561 realizes forward and reverse reciprocating rotation under the action of the external gear 542.
The working process is as follows: the power supply of the equipment is started, the air temperature, the air humidity, the air flow rate and the temperature of the asphalt mixture wheel rolling test piece to be tested are set, the driving motor 57 is started, the driving motor 57 drives the driving gear 571 to rotate, the driving gear 571 drives the rectangular gear 531 to rotate, the supporting spring 541 pushes the movable plate 54 to move upwards all the time, so that the rectangular gear 531 is meshed with the driving gear 571 all the time, further when the driving gear 571 rotates, the rectangular gear 531 is controlled to rotate synchronously, the position of the rectangular gear 531 is changed due to the rotation of the rectangular gear 531, the position of the water vapor spray nozzle 532 on the rectangular gear 531 is changed vertically in a nonlinear mode while rotating, the external insections 542 drive the stirring fan 56 to rotate, the stirring fan 56 fans 56 fan air to flow, the water vapor diffusion is accelerated, meanwhile, the fan plate 543 moves vertically, the fan air flow vertically, the water vapor expansion is further accelerated, and the uniformity of moisture in the test environment in the test bin 4 is improved, starting a wet air forced convection system 2, observing whether various items of wet air data of a test bin 4 are stable and controllable, loading a prepared asphalt mixture wheel-rolling test piece to be tested of 90mm multiplied by 50mm into a sample containing bin 11, wrapping the periphery of the asphalt mixture wheel-rolling test piece by a heat insulation layer 111 and a heat insulation layer 112, contacting the bottom of the asphalt mixture wheel-rolling test piece with a semiconductor low-temperature plate 121 through heat conduction silicone grease, sealing and protecting the surface to be tested of the asphalt mixture wheel-rolling test piece through a sealing layer 113 in the preparation process, isolating air influence, keeping the temperature of the asphalt mixture wheel-rolling test piece constant for 15min, taking down the sealing layer 113, exposing the testing surface of the asphalt mixture wheel-rolling test piece for testing, measuring the quality through a precision balance 31 by a freezing state monitoring system 3 along with the surface freezing process of the asphalt mixture wheel-rolling test piece, shooting a freezing process through a high-definition camera 32, and a temperature and humidity sensor 24, and acquiring data of the wind speed sensor 25, and recording digital images of the temperature, the air humidity, the air flow rate, the ice coagulation quality and the ice film coagulation process of the asphalt mixture wheel-milled test piece acquired by the test system in real time to obtain a test result.
In summary, the following steps: according to the temperature and humidity adjustable pavement ice condensation simulation and test device, the humidistat 21 is arranged to make water into water vapor which is diffused into the test bin 4, so that the humidity of the test environment in the test bin 4 is improved, the actual humid and cold winter environment in the south is simulated, the water vapor ice condensation simulation test device is manufactured, and the condition that the water vapor ice condensation of the pavement is carried out under different temperatures can be tested; the sample containing bin 11 adopts the heat preservation layer 111 and the heat insulation layer 112 to preserve heat of a test piece, when the test piece is cooled, the test piece is sealed through the sealing layer 113 to isolate air influence, the semiconductor low-temperature plate 121 is adopted to cool the test piece, the lowest temperature of a cold end can reach-40 ℃, a T-shaped thermocouple and a control circuit are combined, the temperature control precision of the low-temperature plate is +/-0.1 ℃, the measurable range is wide, and the test precision is high; along with the proceeding of the ice-setting process of the surface of the asphalt mixture wheel-milled test piece, the ice-setting state monitoring system 3 measures the quality through the precision balance 31, the high-definition camera 32 shoots the ice-setting process and acquires data of the temperature and humidity sensor 24 and the air speed sensor 25, and digital images of the temperature, air humidity, air flow rate, ice-setting quality and ice film setting process of the asphalt mixture wheel-milled test piece acquired by the testing system are recorded in real time, so that a testing result is obtained, the automation degree is high, and the data of the testing process is detailed; the output end of the humidistat 21 is provided with the uniform distribution assembly 5, the driving motor 57 drives the rectangular gear 531 to rotate through the driving gear 571, the movable plate 54 is driven to move up and down, the vapor sprayer 532 on the rectangular gear 531 rotates, the position of the vapor sprayer is changed in a nonlinear manner, the spraying range of the vapor sprayer 532 is improved, the vapor spraying uniformity of the vapor sprayer 532 is improved, the stirring fan 56 blows air to flow, the fan plate 543 moves up and down, vapor diffusion is accelerated, the uniformity of the humidity of the whole testing environment is improved, and the testing accuracy is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (9)
1. The utility model provides a road surface congeals ice simulation and testing arrangement of adjustable temperature humidifying, is including installing test piece refrigerating system (1), humid air forced convection system (2), test bin (4) of congeal ice state monitoring system (3), its characterized in that: the test piece refrigerating system (1) comprises a sample containing bin (11) and a first refrigerating assembly (12), the refrigerating assembly (12) is installed below the sample containing bin (11), the sample containing bin (11) is used for containing an asphalt mixture wheel-milled test piece, and the refrigerating assembly (12) refrigerates the asphalt mixture wheel-milled test piece;
the wet air forced convection system (2) comprises a humidistat (21), a voltage stabilizer (22), an air circulation assembly (23), a temperature and humidity sensor (24), an air speed sensor (25) and an air refrigerator (26), wherein the humidistat (21) is electrically connected with the voltage stabilizer (22), the humidistat (21) increases humidity for the test environment in the test bin (4) by spraying water vapor, the temperature and humidity sensor (24) detects the environment humidity in the test bin (4), and the air speed sensor (25) detects the air speed in the test bin (4);
the ice-freezing state monitoring system (3) comprises a precision balance (31) arranged below the refrigeration assembly (12), a high-definition camera (32) provided with an anti-fog lens and a computer control module (33), wherein the computer control module (33) records the digital images of the temperature, the air humidity, the air flow rate, the ice-freezing quality and the ice film condensation process of the asphalt mixture wheel-rolling test piece collected in the test bin (4).
2. The temperature and humidity adjustable road surface ice condensation simulation and test device of claim 1, wherein: the sample containing bin (11) comprises a heat insulation layer (111), a heat insulation layer (112) and a sealing layer (113), wherein the heat insulation layer (112) is arranged on the inner wall of the heat insulation layer (111), and the sealing layer (113) is arranged on the upper portion of the heat insulation layer (111).
3. The temperature and humidity adjustable road surface ice condensation simulation and test device of claim 1, wherein: the refrigeration assembly (12) comprises a semiconductor low-temperature plate (121) arranged at the bottom of the sample containing bin (11), a ceramic base (122) connected with the lower surface of the semiconductor low-temperature plate (121), a heat conduction copper pipe (123) embedded in the ceramic base (122), a radiating fin (124) connected with the lower surface of the ceramic base (122) and radiating fans (125) arranged on two sides of the radiating fin (124).
4. The temperature and humidity adjustable road surface ice condensation simulation and test device of claim 1, wherein: air cycle subassembly (23) are including air cycle pipeline (231) and the air cycle fan (232) that are provided with air inlet and gas outlet, install air cycle fan (232) and air cooler (26) in air cycle pipeline (231), and the upper end in test bin (4) inside is installed in air cycle pipeline (231).
5. The temperature and humidity adjustable road surface ice condensation simulation and test device of claim 1, wherein: the output end of the humidistat (21) is provided with a uniform distribution assembly (5), the uniform distribution assembly (5) comprises an inlet hose (51), a universal rotary joint (52), a rotating plate (53), a moving plate (54), a limiting frame (55), a stirring fan (56) and a driving motor (57), one end of the inlet hose (51) is fixedly connected with the output end of the humidistat (21), the other end of the inlet hose (51) is movably connected with the rotating plate (53) through the universal rotary joint (52), the rotating plate (53) penetrates through the moving plate (54), the rotating plate (53) rotates in the moving plate (54) to work, two sides of the moving plate (54) are movably connected with the limiting frame (55), the moving plate (54) moves up and down along the limiting frame (55), the upper end of the limiting frame (55) is provided with the driving motor (57), and the driving motor (57) is meshed with the rotating plate (53) through a driving gear (571).
6. The temperature and humidity adjustable road surface ice condensation simulation and test device of claim 5, wherein: one side of the rotating plate (53) far away from the universal rotating joint (52) is provided with a rectangular gear (531), the rectangular gear (531) is symmetrically provided with vapor spray heads (532), the vapor spray heads (532) are communicated with the universal rotating joint (52), and the rectangular gear (531) is meshed with a driving gear (571).
7. The temperature and humidity adjustable road surface ice condensation simulation and test device of claim 6, wherein: and the two ends of the lower surface of the movable plate (54) are symmetrically provided with supporting springs (541), and the lower ends of the supporting springs (541) are fixedly connected with the limiting frame (55).
8. The temperature and humidity adjustable road surface ice condensation simulation and test device of claim 7, wherein: one side of the movable plate (54) is provided with external threads (542), the external threads (542) are meshed with the stirring fan (56), and the other side of the movable plate (54) is provided with a fan plate (543).
9. The temperature and humidity adjustable road surface ice condensation simulation and test device of claim 8, wherein: the stirring fan (56) is connected with the limiting frame (55) through a connecting plate, a fan blade gear (561) is connected to the stirring fan (56), and the fan blade gear (561) is meshed with the external gear patterns (542).
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| CN116559169A (en) * | 2023-07-11 | 2023-08-08 | 中南大学 | Real-time pavement state detection method |
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